Got a replacement from VW Parts, for around £60 (with bulbs and back part)
I can't quite seem to line it up properly, but I'll give it another go tonight
It's got 3 bolts holding it on that back so it was easy to remove the old one and put this in.
Previously: 51 Passat 1.9TDI 130PD Sport Estate - gallery - upsolute, rear chrome strip, cruise control, kenwood subwoofer, pioneer 5000ub, 160gb usb hd, oesunshades, isofix - was for sale - 90 Scirocco Scala 1.8i - gallery - (sold), 01 Passat 1.9TDI 100PD S Saloon (chippeduk: ~138) - gallery